Slotting heads

ABSTRACT

A slotting head of the kind comprising a carrier for at least one male slotting knife blade which is adapted to co-operate with female slotting knives to cut slots in corrugated board or similar material in a converting machine, characterised by the provision of single means, for securing the or each knife blade against movement around the periphery of the carrier and at least one further means angularly spaced from said single means, for securing same against lateral movement with respect to the carrier, whereby only said single means requires manipulation in order to adjust the angular position of the knife blade with respect to the periphery of the carrier.

United States Patent 1191 Sullivan Nov. 20, 1973 54] SLOTTlNG HEADS 740,763 10/1903 146611161 83/699 x 3,211,066 10/1965 Palamenti 83/332 x [75 l Inventor: John Anthony sulhvan 2,718,828 9/1955 Buda et al 83/332 x Woodsmoor, Stockport, England Assignee: Henry Simon Limited, Cheadle Heath. Stockport, Cheshire England Filed: June 23, 1971 Appl. N0.: 155,789

Foreign Application Priority Data Aug. 12, 1970 Great Britain 38,765/70 US. Cl 83/332, 83/673, 83/699 Int. Cl B26d 1/28 Field of Search 83/691, 332, 699,

References Cited UNITED STATES PATENTS Jaeger 83/699 X Primary Examiner-Frank T. Yost Assistant Examinerl-lorace M. Culver Attorney-James E. Nolan [57] ABSTRACT A slotting head of the kind comprising a carrier for at least one male slotting knife blade which is adapted to co-operate with female slotting knives to cut slots in corrugated board or similar material in a converting machine, characterised by the provision of single means, for securing the or each knife blade against movement around the periphery of the carrier and at least one further means angularly spaced from said single means, for securing same against lateral movement with respect to the carrier, whereby only said single means requires manipulation in order to adjust the angular position of the knife blade with respect to the periphery of the carrier.

8 Claims, 7 Drawing Figures PAIENIEUHUYPQ 19m 3,772,953

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ATTORNEYS SLOTTING HEADS This invention concerns a slotting head of the kind (hereinafter termed of the kind referred to) comprising a carrier for at least one male slotting knife blade which is adapted to co-operate with female slotting knives to cut slots in corrugated board or similar material in a converting machine. 7

On conventional slotting heads of the kind referred to it is customary to provide a plurality of bolts at angularly spaced intervals to secure the male slotting knife blade to the carrier to ensure that the blade is firmly secured against both movement around the periphery of the carrier and movement laterally with respect to the carrier. Thus when it is desired to adjust the angular position of the knife blade it is necessary to loosen and retighten a plurality of bolts, resulting in a substantial time requirement for adjustment purposes.

It is an object of the present invention to provide a slotting head of the kind referred to which is constructed and arranged so as to overcome, at least to some extent, the disadvantage aforesaid.

According to the present invention a slotting head of the kind referred to is characterized by the provision of single means for securing a knife blade against movement around the periphery of the carrier and at least one further means angularly spaced from said single means, for securing same against lateral movement with respect to the carrier, whereby only said single means requires manipulation in order to adjust the angular position of the knife blade with respect to the periphery of the carrier.

It is customary for a knife blade of extended length to be built up from separate knife blade segments, and in one embodiment of the invention such segments'are individually secured rigidly to a common support member which is itself connected with the carrier both by said single means and said further means.

The invention will be further apparent from the following description, with reference to the several figures of the accompanying drawings, which show, by way of example only, a number of forms of slotting head embodying the invention.

Of the drawings:

FIG. 1 shows a fragmentary end view of a first form of slotting head equipped with a single knife blade comprised by a single knife blade segment;

FIG. 2 shows a cross-section of the slotting head on the line IIII of FIG. 1;

FIG. 3 shows a cross-section of the slotting head on the line III-III of FIG. 1;

FIG. 4 shows an end view of a second form of slotting head equipped with two knife blades each of which is constructed from a plurality of individual knife blade segments;

FIG. 5 shows a cross-section of the slotting head on the line V-V of FIG. 4;

FIG. 6 shows a cross-section of the slotting head on the line VI-VIof FIG. 4; and

FIG. 7 shows a fragmentary end view of a slotting head similar to that of FIG. 4 but additionally equipped with a glue lap cutting knife.

Referring firstly to FIGS. 1 to 3 of the drawings, it will be seen that the slotting head comprises an annular carrier 10 which is adapted to be secured on a shaft which extends transversely of tthe slotting section of a converting machine. In known manner the carrier 10 carries a knife blade 11 which is secured to its periphery and adapted to ,co-operate with female slotting knives to cut slots in corrugated board or similar material. Running around one end face of the carrier 10 at a position inwardly spaced from its periphery, is an annular slot 12 of T-cross section. The knife blade ll is secured to the carrier 10 by means of two bolts 13 and 14 respectively.

As can be seen from FIG. 2 the bolt 13 has a head 13a which is located in the base of the slot 12 and a shank 13b which extends outwardly through the slot 12 to pass through an aperture in the blade 11 to receive a nut 15.

As can be seen from FIG. 3 the bolt 14 has a head 14a which is slidably located in the base of the slot 12, a first shank part 14b which extends outwardly through the slot 12 to form a shoulder at its junction with a second shank part 14d of reduced diameter which passes through an aperture in the blade 11 to receive a nut 16.

The heads 13a and 14a of both bolts 13 and 14 are a sliding fit within the channel 12. When the nut 15 on the bolt 13 is tightened, the blade 11 is firmly gripped against the carrier 10 and locked against movement around the periphery of the carrier. When the nut 16 on the bolt 14 is tightened, the blade 11 is firmly gripped against the shoulder 14c and thereby secured against lateral displacement from the carrier 10 by the action of the head 14a of the bolt 14 lying in the slot 12.

It will be understood that when it is desired to adjust the angular position of the blade 11 it is only necessary to loosen the nut 15; the blade may then be moved around the periphery of the carrier, the bolt heads 13a and 14a then sliding around slot 12. The blade 11 may be relocked against further movement around the periphery of the carrier 10 by retightening the nut 15.

Referring now to FIGS. 4 to 6 inclusive, wherein like parts are indicated by like reference numerals, it will be seen that there are two separate knife blades 20 and 21. The blade 21 is comprised by separate blade segments 22 and 23 which are each secured to the carrier 10 by means of bolts 13 similar to those illustrated in FIG. 2. The blade 21 is fixed and not intended to be adjusted around the periphery of the carrier 10.

The blade 20 is also formed from two separate blade segments 24 and 25. As in the previously described embodiment the blade 20 is secured to the carrier 10 against movement around its periphery by a single bolt 13, an additional bolt 14 being provided to secure the blade against lateral displacement from the carrier at a position spaced from the bolt 13. The construction and operation of the bolts 13 and 14 is the same as described in connection with the previous embodiment, but in this embodiment a support plate 26 is provided and located on the outside of the blade segments 24 and 25, the bolts 13 and 14 extending therethrough so that the two blade segments 24 and 25 are firmly connected with the support plate 26 when the nuts 15 and 16 are tightened, so that the entire assembly is locked against movement around the periphery of the carrier 10 by virtue of the single bolt 13.

Conveniently, the support plate 26 or the blade itself is provided with a graduated scale 27 and the carrier 10 with a datum line 28 to facilitate proper adjustment of the position of the blade 20.

FIG. 7 illustrates a slotting head similar to that of FIG. 4 but additionally equipped with a glue lap cutting knife 30. The knife 30 is secured by means of bolts 31 to the support plate 26, so that once again this part is connected with the entire assembly and may thus be locked to the carrier by virtue of the single bolt 13.

It will be appreciated that it is not intended to limit the invention to the above examples only, many variations such as might readily occur to one skilled in the art beingpossible without departing from the scope thereof.

Thus, for example, a blade may be comprised by more than two segments when each would be secured to a support plate by means connecting the support plate with the carrier to prevent lateral displacement relative to the carrier, the support plate being secured to the carrier at one location only against movement around the periphery of the carrier.

What is claimed is:

1. In a slotting head assembly having at least one male knife adapted for cooperation with female knife means to cut slots in corrugated board or the like, a rotary carrier, means mounting an arcuate male knife blade at the periphery of said carrier in a laterally fixed circumferentially adjusted position, said mounting means comprising means mounting said knife blade for adjustment circumferentially on said carrier, a first single releasable fixing means on said mounting means for securing said knife blade in circumferentially adjusted position on said carrier, and a further fixing means on said mounting means circumferentially spaced from said first fixing means for securing said knife blade against lateral displacement with respect to said carrier both when said first fixing means is released for circumferential adjustment movement of said knife blade and when said first fixing means has secured said knife blade against circumferential displacement whereby said blade may be displaced and held in a circumferentially adjusted position by manipulation of only said single fixing means while being laterally maintained with respect to said carrier by said further fixing means.

2. A slotting head assembly as recited in claim 1, wherein said first fixing means comprises a first bolt passing through an opening in said blade, a substantially T-shaped arcuate slot on said carrier, a correspondingly shaped head on the inner end of said bolt slidably mounted in said slot, and a nut on the outer end of said bolt which when drawn tight pulls the bolt head against a wall of said slot to clamp said blade to the carrier.

3. A slotting head assembly as defined in claim 2, wherein said further fixing means comprises a second bolt passing through an opening in said blade and having a head slidably mounted in said slot, a nut on the outer end of said second bolt, and a shoulder on the shank of said second bolt against which said knife blade is clamped when said nut is tightened to secure said blade against lateral movement with respect to said carrier, said second bolt head remaining freely slidably disposed in said slot when said nut is tightened.

4. A slotting head assembly according to claim 1, wherein said blade is composed of separate blade segments individually secured rigidly to a common support member, said support member being itself connected with said carrier both by said single fixing means and by said further fixing means.

5. A slotting head according to claim 4, wherein said common support member comprises a plate located on the side of said blade segments remote from the carrier, the bolts of said single fixing means and said further fixing means passing through said plate and said blade segments, there being at least one bolt passing through each blade segment, whereby when the nuts are tightened the entire blade assembly can be secured against angular and lateral movement.

6. A slotting head according to claim 5, wherein a glue lap cutting knife is additionally secured by bolts to said plate and may thus be additionally locked against angular and lateral movement.

7. A slotting head according to claim 1, wherein said blade is provided with a graduated scale and the carrier with a datum line to facilitate accurate adjustment of the circumferential position of the blade.

8. A slotting head according to claim 4, wherein said support member or the blade itself is provided with a graduated scale and the carrier with a datum line to facilitate accurate adjustment of the position of the circumferential blade.

* t In 

1. In a slotting head assembly having at least one male knife adapted for cooperation with female knife means to cut slots in corrugated board or the like, a rotary carrier, means mounting an arcuate male knife blade at the periphery of said carrier in a laterally fixed circumferentially adjusted position, said mounting means comprising means mounting said knife blade for adjustment circumferentially on said carrier, a first single releasable fixing means on said mounting means for securing said knife blade in circumferentially adjusted position on said carrier, and a further fixing means on said mounting means circumferentially spaced from said first fixing means for securing said knife blade against lateral displacement with respect to said carrier both when said first fixing means is released for circumferential adjustment movement of said knife blade and when said first fixing means has secured said knife blade against circumferential displacement whereby said blade may be displaced and held in a circumferentially adjusted position by manipulation of only said single fixing means while being laterally maintained with respect to said carrier by said further fixing means.
 2. A slotting head assembly as recited in claim 1, wherein said first fixing means comprises a first bolt passing through an opening in said blade, a substantially T-shaped arcuate slot on said carrier, a correspondingly shaped head on the inner end of said bolt slidably mounted in said slot, and a nut on the outer end of said bolt which when drawn tight pulls the bolt head against a wall of said slot to clamp said blade to the carrier.
 3. A slotting head assembly as defined in claim 2, wherein said further fixing means comprises a second bolt passing through an opening in said blade and having a head slidably mounted in said slot, a nut on the outer end of said second bolt, and a shoulder on the shank of said second bolt against which said knife blade is clamped when said nut is tightened to secure said blade against lateral movement with respect to said carrier, said second bolt head remaining freely slidably disposed in said slot when said nut is tightened.
 4. A slotting head assembly according to claim 1, wherein said blade is composed of separate blade segments individually secured rigidly to a common support member, said support member being itself connected with said carrier both by said single fixing means and by said further fixing means.
 5. A slotting head according to claim 4, wherein said common support member comprises a plate located on the side of said blade segments remote from the carrier, the bolts of said single fixing means and said further fixing means passing through said plate and said blade segments, there being at least one bolt passing through each blade segment, whereby when the nuts are tightened the entire blade assembly can be secured against angular and lateral movement.
 6. A slotting head according to claim 5, wherein a glue lap cutting knife is addItionally secured by bolts to said plate and may thus be additionally locked against angular and lateral movement.
 7. A slotting head according to claim 1, wherein said blade is provided with a graduated scale and the carrier with a datum line to facilitate accurate adjustment of the circumferential position of the blade.
 8. A slotting head according to claim 4, wherein said support member or the blade itself is provided with a graduated scale and the carrier with a datum line to facilitate accurate adjustment of the position of the circumferential blade. 